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Presented by:Patrizzia Ann Rose Ocbina
Alea Jurquina
Kim
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INTEGUMENTARY SYSTEM
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The integumentary system is an organ
system consisting of the skin, hair, nails,and exocrine glands. The skin is only a
few millimeters thick yet is by far the
largest organ in the body.
INTEGUMENTARY SYSTEM
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Why do we need
Skin?
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-Skin protects you by keeping
moisture in your body and foreignparticles out of your body
-Skin keeps you in touch with theoutside world. The nerve endings
in your skin allow you to feelwhats around you
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ACCESSORY STRUCTURE
NAILS
HAIR
GLANDS
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THE SKIN
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1. skin
a. epidermis (superficial epithelium)
b. dermis (under lying connective tissuelayer)
2. hair
3. nails
4. glands
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The two layers-The epidermisis thethinner layer of the two. Itis what you see when you
look at your skin-The deeper, thicker layer isknown as the dermis
- Subcutaneous Layer also
known as the hypodermis,isfound between the skin andany underlying structuressuch as muscle or bone
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EPIDERMIS
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-The epidermis is composed of a type of
epithelial tissue.
-The epidermis is only as thick as two
sheets of notebook paper over most of thebody
-It is thicker in the palms of your hands
and the soles of your feet.
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-Most epidermal cells are dead and
are filled with a protein calledkeratin, which helps make the skin
tough.-The Epidermis is made up of
stratified squamos
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DERMIS
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-The dermis lies underneath the
epidermis
-It is mostly connective tissue, and
it contains many fibers made of aprotein called collagen
-The fibers provide strength andallow skin to bend without tearing
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The Hair
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-A hair is formed at the bottom of a
tiny sac called a hair follicle-The hair grows as new cells are
added at the hair follicle and oldercells get pushed upward
-The only living cells in a hair are in
the hair follicle
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FUNCTIONS OF THE HAIR
-Hair protects skin from ultraviolet light
and keeps dust and insects out of your
eyes and nose.
-Hair helps regulate body temperature
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The Nails
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-a horny covering on the upper
surface of the tip of the finger andtoe in humans and other primates.
-Nails form from nail roots underthe skin at the base and sides of
nails
-As new cells form, the nail growslonger
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FUNCTION OF THE
NAILS
-Nails protect the tips of yourfingers and toes so that they can
remain soft and sensitive
-Nails can tell you your healthbody
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THE GLAND
There are four types of glands:
Sweat glands - make sweat to control
temperature.
Sebaceous glands - make oil.
Ceruminous glands - make ear wax.
Mammary glands - make milk and are
only in women.
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Thin skin-covers most of the
body and is associated with hairfollicles,sebaceous glands,and
sweat glandsThick skin-has sweat glands but
no sebaceous glands or hairfollicles
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